Cheyenne Jackson has found love again with actor Jason Landau! The 30 Rock alum, 38, is engaged to marry Landau just six months after ending his 13-year relationship with husband Monte Lapka, a source tells Us Weekly.

"They've already begun planning the wedding!" the insider says of the happy couple, who went public with their romance in October 2013, and then attended the 2013 amfAR Inspiration Gala together in December. (More recently, they hit up the Kari Feinstein Style Lounge at the 2014 Sundance Film Festival in Park City, Utah.)

This will be Jackson's second marriage. He and Lapka married in New York in September 2011 after 11 years together; they announced in August that they had "mutually decided to divorce."

"It's a sad thing anytime a relationship ends," the Glee actor and Broadway veteran -- who publicly came out as gay in 2005 -- said in an interview with The Frank DeCaro Show at the time. "We had a good long run, almost 13 years...[The split] was mutual and it was amicable. He is a wonderful man."

"I'm a little naive to think that people will even care, but they do," he added. "You have to understand the significance that your relationship had to other people. I know that our marriage meant a lot to other people. That's not lost on me, and I respect that."